gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1955.030.228.02 An Accurate Determination of the Cell Dimensions of Bultfonteinite, Ca₄Si₂O₁₀H₆F₂ Megaw Helen D. M.A., Ph.D., F.Inst.P. Kelsey C. H. B.A. Crystallographic Laboratory, Cavendish Laboratory, University of Cambridge 3 1955 30 228 569 573 Copyright © 1955, The Mineralogical Society 1955